Firen: Phonology: Vowel Quality Inventories: Average (5-6)

Firen has a 6-vowel basic system with two phonemic diphthongs and three r-colored vowels.
/i e a ɵ o u/ ⟨i e a ů o u⟩
/ɚ ɑɚ ɔ˞ aɪ aʊ/ ⟨ůṙ aṙ oṙ ai ao⟩